US 11,946,907 B2
Method and system for inspection of joints in composite pipes and of composite repairs in metallic pipelines
Thomas Gabriel Rosauro Clarke, Porto Alegre (BR); Sergio Damasceno Soares, Petrópolis (BR); Ricardo Callegari Jacques, Porto Alegre (BR); Lúcio De Abreu Corrêa, Canela (BR); Henrique Tormen Haan De Oliveira, Porto Alegre (BR); Giovanno Ferrari Zuglian, Porto Alegre (BR); and Alberto Bisognin, Porto Alegre (BR)
Assigned to PETRÓLEO BRASILEIRO S.A.—PETROBRAS, Rio de Janeiro (BR); and UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL—UFRGS, Porto Alegre (BR)
Appl. No. 17/253,791
Filed by PETRÓLEO BRASILEIRO S.A.—PETROBRAS, Rio de Janeiro (BR); and UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL—UFRGS, Porto Alegre (BR)
PCT Filed Jun. 5, 2019, PCT No. PCT/BR2019/050206
§ 371(c)(1), (2) Date May 24, 2021,
PCT Pub. No. WO2019/241862, PCT Pub. Date Dec. 26, 2019.
Claims priority of application No. 102018012394-7 (BR), filed on Jun. 18, 2018.
Prior Publication US 2023/0184720 A1, Jun. 15, 2023
Int. Cl. G01N 29/06 (2006.01); G01N 29/24 (2006.01); G01N 29/34 (2006.01); G01N 29/44 (2006.01)
CPC G01N 29/0645 (2013.01) [G01N 29/2462 (2013.01); G01N 29/348 (2013.01); G01N 29/4418 (2013.01); G01N 2291/104 (2013.01); G01N 2291/2634 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for inspection of joints in composite tubes and of composite repairs in metallic pipelines, comprising:
emitting a series of acoustic wave pulses, at different frequencies, from a collar of acoustic transducers positioned at a predetermined distance from a joint or a repair to be inspected;
recording, during a time interval subsequent to the emission, echoes of wave displacements to the repair or the joint in each of the transducers of the collar of acoustic transducers in the form of an A-Scan;
generating a flattened C-Scan image, through a common source method (CSM), for each frequency of pulse emission from the collar of acoustic transducers; and
circumferentially evaluating a particular defect revealed by the flattened C-Scan image using a predetermined threshold of comparison, in which:
a number of channels reaching the threshold are counted; and
a percentage value of a circumferential extent of the defect is counted based on a quantity of channels that reach the threshold.